Question

question 1
an organic compound composed of carbon and hydrogen connected only by single bonds is an
a aromatic compound
b alkyne
c alkane
d alkene

Explanation:

• Aromatic compound: Usually contains a cyclic structure with delocalized π - electrons (like benzene ring), not just single - bonded C and H.
• Alkyne: Has at least one carbon - carbon triple bond (\(C\equiv C\)).
• Alkane: Is an organic compound (hydrocarbon) where carbon and hydrogen are connected only by single bonds. The general formula is \(C_nH_{2n + 2}\).
• Alkene: Has at least one carbon - carbon double bond (\(C = C\)).

Answer:

C. alkane